Understanding the upgraded battery
The upgraded S600 PRO is advertised with a 48 V 25 Ah battery, equivalent to roughly 1,200 Wh of nominal energy. Some older S600 pages still show a 48 V 17.5 Ah battery. These are not the same capacity. Check the physical label and the invoice for your actual bike, especially when comparing range claims or ordering a replacement.
What determines range?
Range is the result of energy capacity divided by energy consumption per kilometre. Consumption rises with speed, acceleration, steep gradients, headwinds, heavy loads, low tyre pressure, cold temperatures, rough surfaces and sustained use of both motors. Frequent stops can also use more energy because the bike repeatedly accelerates from rest. Pedalling actively and choosing a lower assist level can help reduce consumption.
Marketing pages quote different distances depending on whether they mean pure-electric mode or pedal-assist mode and which test conditions were used. Treat “up to” claims as best-case estimates, not a promise. If planning a long route, leave a reserve for detours, weather and battery ageing.
A practical range-test method
- Set tyre pressure within the range printed on the tyre and recommended by the bike documentation.
- Use a familiar route with similar elevation and stop-start conditions.
- Record rider/cargo mass, temperature, wind, assist level and motor mode.
- Start with a fully charged battery according to the supplied charging instructions.
- Record distance and remaining battery indication at several points. Battery bars are approximate and may not decline linearly.
- Repeat the test before concluding that the battery has degraded.
Charging safely
- Use the supplied charger or an explicitly approved replacement with matching electrical specifications.
- Inspect the charger, cable and connectors before each use; do not use damaged equipment.
- Charge in a dry, ventilated location away from exits, heat sources and combustible clutter.
- Do not charge a battery that is wet at its electrical contacts, damaged, swollen, leaking or unusually hot.
- Do not leave charging equipment where children or pets can pull it over.
- Follow the manufacturer's advice on charging completion and storage; do not invent a different voltage or charging profile.
Storage and temperature
Extreme heat and cold can affect performance and long-term battery health. If the bike has been left in very cold conditions, let the battery return to the manufacturer's recommended charging temperature before connecting the charger. For extended storage, use the storage charge level and inspection interval specified in the actual manual. Check it periodically rather than leaving a battery unattended for months.
Signs that need immediate attention
Stop charging and using the battery if it swells, leaks, emits an unusual chemical smell, hisses, smokes, becomes unusually hot, or has suffered a serious impact. Do not open the case or attempt cell-level repairs. If it is smoking or venting, move away, keep others clear and follow local emergency advice.
Range complaints: a checklist before replacing the battery
- Are the tyres underinflated or visibly damaged?
- Does either brake drag when the wheel is spun safely off the ground?
- Has the route become hillier or windier?
- Are you riding faster or using dual-motor mode more often?
- Has the weather become colder?
- Does the battery indicator fall abruptly or does the display restart?
- Does the charger behave as described in its own manual?
If range suddenly collapses under normal conditions, have the battery, charger, connectors and controller checked. Do not diagnose a battery solely from its age or one ride.